Each page has a page id so that you can target it specifically with css. If you are using default permalink settings, you’ll see the page ID in the url of the page or when you hover over the page name when viewing all pages in your wordpress admin area.

Thanks for the help with this. Another question, I’m trying to make the header (top) transparent, but I’m not sure how to target it, I’m talking about area where my account, cart, checkout is. Could you assist?